The relative accuracy of three transcutaneous dual electrodes at 45 degrees C in adults.

Measurements made by transcutaneous electrodes can be compared with arterial blood gases in several different ways. The relationship between them is commonly expressed by a linear regression equation, and a correlation coefficient, r, calculated. However calculation of the bias and the precision of transcutaneous electrode readings is more helpful in clinical practice. The differences between the two methods are explained by comparing the relationship of three transcutaneous dual electrodes to endtidal gases in adults.